基于农户调查的长江流域双季稻生产碳、氮足迹分析——以江西和湖南为例

陈中督, 徐春春, 纪龙, 方福平

Carbon and Nitrogen Footprints of Double Rice Production in Yangtze River Based on Farm Survey Data——A Case Study of Jiangxi and Hunan

Chen Zhongdu, Xu Chunchun, Ji Long, Fang Fuping

表4 基于回归模型的系数估计和边际效应分析

Table 4 Coefficient estimates and marginal effects of the Poisson regression model

解释变量 Explaining variable 碳足迹Carbon footprint 氮足迹Nitrogen footprint 回归系数 Coefficient of estimate 边际效应 Marginal effect 回归系数 Coefficient of estimate 边际效应 Marginal effect 性别Gender 0.115(0.058) 0.018(0.009) 0.216(0.108) 0.033(0.017) 年龄Age 0.061(0.031)* 0.009(0.005)* 0.044(0.022)** 0.007(0.003)** 教育Education -0.330(-0.165)* -0.063(-0.032)** -0.345(-0.173)* -0.066(-0.033)* 耕作年限Experience -0.052(-0.026) -0.008(-0.004) -0.033(-0.017) -0.005(-0.003) 耕作面积Farm size -0.053(-0.027)* -0.008(-0.004)* -0.067(-0.034)* -0.010(-0.005)* 气候变化认知Climate change awareness -0.040(-0.020) -0.006(-0.003) -0.058(-0.029) -0.009(-0.005) 低碳绿色认知Low carbon awareness -0.336(-0.168)* -0.053(-0.027)** -0.412(-0.206)* -0.065(-0.033)* 风险规避意识Risk aversion -0.182(-0.091) -0.028(-0.014) -1.303(-0.652) -0.201(-0.101) 农业收入比例Farm income ratio 0.162(0.081) 0.026(0.013) 0.173(0.087) 0.027(0.014) 机械拥有量Machinery ownership -0.173(-0.087)* -0.028(-0.014)* -0.048(-0.024)* -0.008(-0.004)* 土壤肥力状况Soil fertility deficiency -0.229(-0.115)* -0.038(-0.019)** -0.121(-0.061)* -0.020(-0.011)* 灌溉条件Sufficient water irrigation -0.220(-0.110)*** -0.037(-0.018)** -0.145(-0.073)** -0.024(-0.012)** 信贷途径Credit access 0.113(0.057) 0.019(0.010) 0.159(0.080) 0.027(0.014) 技术支持Technical support -0.350(-0.175)*** -0.061(-0.031)** -0.341(-0.171)*** -0.060(-0.031)***